WeldingPro: Calc & Job Log

Welding calculators that answer the questions you actually stop to work out on the shop floor — amperage, heat input, gas flow, stickout — with a job and customer log layered on top for anyone welding for money.

CALCULATORS
• Amperage — suggested starting amps from process, stock thickness and electrode or wire diameter
• Heat input — volts, amps and travel speed to kJ/mm or kJ/in, shown both ways: the AWS D1.1 / ASME IX figure (no efficiency factor) and the ISO/EN 1011-1 figure (× arc efficiency)
• Travel speed — the heat input screen also shows roughly how fast to travel to stay at 2.0 kJ/mm
• Shielding gas flow — suggested CFH from process, nozzle size and how draughty the bay is
• Stickout and contact-tip-to-work distance guidance per process
• Reference cards for MIG, TIG, Stick and flux-core

All of it works without an internet connection and without an account.

JOB LOG
• One record per job: client, parts welded, process, position, base metal, heat number and welder stamp
• Filler, electrode, gas and arc, setup and fit-up time recorded against the job
• Before, during and after photos attached to the job
• Job history grouped by date, colour-coded by process

GAS CYLINDERS
• Cylinder levels that draw down as you log gas against a job, with a daily low-level alert before you run dry mid-bead
• Delete a gas line or a job and the gas goes back into the cylinder it came from

COSTING
• Material, gas, labour and overhead rolled up per job
• Discount applied before tax, so the quoted figure matches the invoice
• Quoted against actual, with the variance shown
• Currency picker covering 152 currencies
• PDF invoices with a traceability block, and a customer ledger for what is paid and what is outstanding

TRACEABILITY
• WPS library — store the procedures you weld to and attach one to a job
• Welder qualification log with expiry dates and reminders 60, 30 and 7 days before a qualification lapses
• Heat number, welder stamp and linked WPS printed on the job's invoice

REPORTS Jobs by process, cost mix (filler, electrodes, gas, labour, overhead and tax), top customers and outstanding balances, exportable as PDF or CSV.

PERFECT FOR
• Hobbyists and weekend fabricators who want the numbers without the guesswork
• Trade students learning what heat input actually means
• Solo professional welders and small fab shops running a handful of jobs a week
• Structural, pipeline and oilfield welders who need job traceability for paid contracts

WHAT IS FREE AND WHAT IS PREMIUM Free, with no limit: the full calculator suite and reference cards for every process, the WPS library and the welder qualification log. Free, with limits: the job log for MIG and TIG jobs (3 open jobs at a time, 20 jobs in total), one gas cylinder, 3 customers and 25 photos. Premium removes those limits, unlocks Stick, flux-core and oxy-fuel jobs and ad-free PDF invoices — monthly, yearly, or a one-time purchase that never renews.

IMPORTANT Every figure this app produces is a suggested starting point based on published guidance. It is not a qualified welding procedure. Always follow your WPS, your employer's procedures and the manufacturer's data for the consumables and machine you are using, and qualify your procedure where the code requires it. This app is not affiliated with AWS, ASME, API, ISO or any standards body.

Open the amperage calculator and check your settings before the next bead.